Albert heberle



(No Model.)

A. HEBERLE.

WATCH ESOAPEMENT.

No. 258,646. Patented May 30, 1882.

N. PETERS. Phokvblhognpiwr, Walhinglon. 0. Q

' with the duplex,

UNITED STATES PATENT OFFICE.

ALBERT HEBERLE, OF UEBERLIN GEN, GERMANY.

WATCH-ESCAPEM ENT.

SPECIFICATION forming part of Letters Patent No. 258,646, dated May 30, 1882.

Application filed January 12, 1882. (No model.)

To all whom it may concern Be it known that I, ALBERT HEBERLE, of Ueberlin gen in the Empireof Germany, have invented an Improvement in Watch-Escapements,of which the following is a specification.

My invention relates to an improved escapement, the chief advantages of which are the following: First, the tooth of the escapement-wheel rests at a very little distance from the geometrical axis of the arbor ot' the balance, and consequently produces very little friction during the rest; second, the impulse is given to the balance at a point more distant from the geometrical axis of the balance thanin the cylinder-escapement; third, great facility is afforded for the replacing the pieces which compose the escapeinent, which renders the improvement particularly well suited for interchangeable watches. My escapement has consequently the same advantages as the duplex escapement, and is at the same time much easier to construct and less costly, without having the inconvenience, as is the case of easily coming to astop when the bearer of the watch experiences a Sh1li6f01 instance, when riding on horseback, or running, leaping, 8:0. This difi'erence arises from the fact that in my escapement the impulse is given every alternate vibration and during a larger portion of the vibration than in the duplex escapement.

In the annexed drawings, Figure 4 shows a perspective view of my escapeinent. Figs. 1, 2, and 3 show the different phases of its working.

In all the figures the same letters refer to the same pieces.

The escapement-wheel A bears the desired number of teeth a a a 850., each formed as a triangle, the apex of which rests against the axis of the balance, and one side of which serves to give an impulse to the balance. The

teeth are elevated above the surface of the wheel, as seen in Fig. at. The impulse-teeth may have a flat or convex surface, and make 5 with the radius of the wheel a more or less acute angle.

The portion of the axis C of the balance B which acts as the roller is provided with a longitudinal groove, 0. hub of the balance is provided with a pin, (1, which is parallel with the axis of the balance, and sufficiently far from the axis of the balance to swing behind the impulse-teeth and above the surface of The distance between the centers of the balance and the cscapemcnt-wheel is a little less than the sum of the radii of the latter and of the axis 0, so that, as shown in Fig. 1, the end of the escapement-wheel tooth bears against the roller or axis 0 as long as it does not meet the notch c of the latter. During the whole dead vibration of the balance-viz., as long as the axis of the balance moves in the direction shown by the arrow in of the escapement-wheel remains against the arbor of the balance; but when moving the other way, and at the moment the notch c meets the end of the tooth, this latter falls into the notch c, which allows the tooth to pass, as

The impulse-tooth strikes the seen in Fig. 2. impulse-pin (I and gives to the balance the required acceleration.

Fig. 3 shows the position of the escapement when the pin is about to leave the impulsctooth.

I claim as my invention- In an escapement, the triangular impulse and cscapement teeth elevated above the surface of the escapement-wheel, in combination with the balance having a grooved arbor and the impulse pin 67, substantially as specified.

ALBERT HEBERLE. Witnesses:

E. KENDEL, PAUL BoNz.

The central part or 50 the escapement-wheel. 55

Fig. l-the tooth 65 

